How do I update foreign key with odata json - dynamics-crm

Question

Expected behavior: User clicks on Register button and record is created in related entity. This has worked up til now but now we have requirement to update the foreign key based on a lookup on the current form. How do I accomplish this? The pasted code below throws error in browser "Error on the creation of record; Error – Bad Request"
// JScript source code
CreateButton = function () {
var fieldTable = crmForm.all.new_registerbutton_d;
var html = "<TABLE border=0 cellSpacing=0 cellPadding=0><TBODY><TR><TD width=0px>" + fieldTable.innerHTML + "</TD><TD width=200><INPUT style='BACKGROUND-COLOR: #d8e8ff' onclick=Button_OnClick() value='Register' type=button></TD></TR></TBODY></TABLE>";
fieldTable.innerHTML = html;
document.all.new_registerbutton.style.display = 'none';
crmForm.all.new_registerbutton_c.innerText = "";
}
Button_OnClick = function () {
//var new_se_registration = new Object();
var invitationName = Xrm.Page.getAttribute("new_name").getValue();
//new_se_registration.new_name = invitationName;
var invitationGUID = Xrm.Page.data.entity.getId().replace('{', '').replace('}', '');
alert(invitationGUID);
var value = new Array();
value[0] = new Object();
value[0].id = invitationGUID;
value[0].name = invitationName;
//var invitation = {
//id: invitationGUID, name: invitationName, entityType: "new_se_registration"
//};
//var invitation= { Id: invitationGUID, LogicalName: "new_se_registration", Name: invitationName };
//value[0].entityType = Xrm.Page.data.entity.getEntityType();
//new_se_registration.new_new_se_invitation_new_se_registid.setValue([{ id: invitationGUID, name: invitationName, entityType: "new_se_registration"}]);
//new_se_registration.new_new_se_invitation_new_se_registid = invitation;
//new_se_registration.new_eventname= Xrm.Page.getAttribute("new_eventname").getValue();
//new_invitationid is the Event id
var lookupItem = new Array;
lookupItem = crmForm.all.new_invitationid.DataValue;
var eventname = lookupItem[0].name;
//new_se_registration.new_eventname = eventname;
lookupItem = crmForm.all.new_invitationid.DataValue;
var new_se_registration = {
new_new_se_invitation_new_se_registid: {
__metadata: { type: "Microsoft.Crm.Sdk.Data.Services.EntityReference" },
Id: invitationGUID,
LogicalName: invitationName
},
new_name: invitationName,
new_eventname: eventname
};
//alert ( eventname);
// end Ek - adding event name
//deleteRecord(new_se_registration.new_name, "new_se_registrationSet");
var reg = Xrm.Page.getAttribute("new_registered").getValue();
if (reg == null) {
reg = "N";
}
if (reg != "Y") {
//Xrm.Page.getAttribute("new_registered").setValue("Y");
//alert(reg);
//return;
createRecord(new_se_registration, "new_se_registrationSet", RegisterCompleted, null);
Xrm.Page.getAttribute("new_registered").setValue("Y");
//Xrm.Page.data.entity.attributes.get("new_registered").setSubmitMode("always");
//Xrm.Page.data.entity.save();
}
else {
alert("\"" + Xrm.Page.getAttribute("new_name").getValue() + "\" has been registered already.");
}
}
function RegisterCompleted(data, textStatus, XmlHttpRequest) {
var new_se_registration = data;
Xrm.Page.data.entity.save();
alert("\"" + Xrm.Page.getAttribute("new_name").getValue() + "\" has been registered successfully.");
}
function checkDuplicate() {
alert("test");
}
function deleteRecord(id, odataSetName) {
var serverUrl = Xrm.Page.context.getServerUrl();
var ODATA_ENDPOINT = "/XRMServices/2011/OrganizationData.svc";
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
datatype: "json",
url: serverUrl + ODATA_ENDPOINT + "/" + odataSetName + "(guid'" + id + "')",
beforeSend: function (XMLHttpRequest) {
//XMLHttpRequest.setRequestHeader("Accept", "application/json");
XMLHttpRequest.setRequestHeader("X-HTTP-Method", "DELETE");
},
success: function (data, textStatus, XmlHttpRequest) {
alert("Record deleted successfully!");
},
error: function (XmlHttpRequest, textStatus, errorThrown) {
alert("Error while deletion – " + errorThrown);
}
});
}
function createRecord(entityObject, odataSetName, successCallback, errorCallback) {
var jsonEntity = window.JSON.stringify(entityObject);
var serverUrl = Xrm.Page.context.getServerUrl();
var ODATA_ENDPOINT = "/XRMServices/2011/OrganizationData.svc";
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
datatype: "json",
url: serverUrl + ODATA_ENDPOINT + "/" + odataSetName,
data: jsonEntity,
beforeSend: function (XMLHttpRequest) {
XMLHttpRequest.setRequestHeader("Accept", "application/json");
},
success: function (data, textStatus, XmlHttpRequest) {
if (successCallback) {
successCallback(data.d, textStatus, XmlHttpRequest);
}
},
error: function (XmlHttpRequest, textStatus, errorThrown) {
if (errorCallback)
errorCallback(XmlHttpRequest, textStatus, errorThrown);
else
alert("Error on the creation of record; Error – " + errorThrown);
}
});
}

Answer 1

Solved. Case sensitivity. Was using wrong case for new_new_se_invitation_new_se_registId.
var new_se_registration = {
new_new_se_invitation_new_se_regist**I**d: {
__metadata: { type: "Microsoft.Crm.Sdk.Data.Services.EntityReference" },
Id: invitationGUID,
LogicalName: invitationName
},
new_name: invitationName,
new_eventname: eventname
};